{"product_id":"siemens-qj3m125h-circuit-breaker","title":"Siemens | QJ3M125H | Circuit Breaker | 125A | 3-Pole | 240V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens QJ3M125H circuit breaker — a dependable 125-amp, 3-pole protection device engineered for 240V three-phase systems. This bolt-on breaker is a precise fit for maintenance, retrofit, or replacement projects where exact compatibility matters, ensuring your electrical protection remains reliable and up to code.\u003c\/p\u003e \u003ch2\u003eKey specifications and why they matter\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage: 125 A\u003c\/strong\u003e — protects circuits with substantial load while minimizing nuisance trips.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles: 3-Pole\u003c\/strong\u003e — designed for three-phase power distribution, providing balanced protection across all lines.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage: 240 V\u003c\/strong\u003e — suited for common commercial and industrial 240V service environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting: Bolt-On\u003c\/strong\u003e — offers straightforward, secure installation in compatible panels with efficient hardware fit.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number: QJ3M125H\u003c\/strong\u003e — use this reference to verify exact fit and ratings before ordering; it’s the most reliable compatibility guide.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWho this is for and when to use it\u003c\/h2\u003e\n\u003cp\u003eIdeal for professionals performing panel maintenance, retrofits, or replacements in Siemens-based electrical systems. If you’re upgrading or restoring protection in a three-phase 240V setup, the QJ3M125H provides a seamless, OEM-compatible option that aligns with existing Siemens protection schemes.\u003c\/p\u003e \u003ch2\u003eInstallation considerations and practical tips\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eAlways \u003cstrong\u003econfirm fit and ratings\u003c\/strong\u003e against your panel’s documentation using the part number QJ3M125H as the primary reference.\u003c\/li\u003e \u003cli\u003ePlan the replacement for a de-energized system and follow distributor and local electrical codes during installation.\u003c\/li\u003e \u003cli\u003eConsider the overall protection strategy: ensure this 125 A, 3-pole device matches the upstream and downstream protection levels to maintain coordinated safety.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy choose a Siemens OEM solution\u003c\/h2\u003e\n\u003cp\u003eAs an OEM Siemens circuit breaker, the QJ3M125H is designed to deliver consistent trip behavior and reliable integration within your existing electrical architecture, reducing the risk of compatibility gaps that can occur with non-OEM components.\u003c\/p\u003e \u003cp\u003eFor precise compatibility, reference the part number QJ3M125H when reviewing specifications and placing your order, and ensure all work complies with applicable electrical codes and safety standards.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46427416821922,"sku":"QJ3M125H","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_ad06fdd7-931c-4a09-bfbe-d05329579cd6.png?v=1765492978","url":"https:\/\/www.ampstate.com\/products\/siemens-qj3m125h-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}